Mailer To Go vs Postmark
Postmark has a strong reputation for fast, reliable transactional delivery and excellent support. Mailer To Go shares that transactional focus, and adds delegated DNS management and native provisioning on Heroku-compatible platforms. Here’s an honest comparison.
At a glance
| Capability | Mailer To Go | Postmark |
|---|---|---|
| Transactional-email focus | Yes | Yes |
| SMTP relay | Yes | Yes |
| REST send API | In development | Yes |
| Guided SPF / DKIM / DMARC | Yes | Yes |
| Managed subdomain via one delegated NS record (auto-rotated DNS) | Yes | Manual DNS records |
| Automatic bounce/complaint suppression | Yes | Yes |
| Delivery event webhooks | Yes | Yes |
| Heroku / Addons.io / Build.io add-on | Yes (config-var native) | Not a native add-on |
Mailer To Go starts at $15/mo for 25,000 emails with pay-as-you-go overage — see full pricing. Competitor pricing changes often; check their current published plans directly.
Where Postmark is strong
Postmark is well-regarded for deliverability, speed, separate message streams for transactional vs. broadcast, and responsive support. It’s a polished, transactional-first product with a loyal following.
Where Mailer To Go is different
- DNS you don’t manage. Delegate
mtg.yourdomain.comwith one NS record; we publish and auto-rotate SPF/DKIM/DMARC. Details. - Config-var-native on Heroku, Addons.io, and Build.io — provision and go.
- Reputation isolation on a dedicated subdomain by default.
The honest trade-off today: Postmark has a mature REST API; ours is in development, so you send over SMTP, which works from any language (quickstart).
Switching from Postmark
Moving providers is a credentials-and-DNS swap you can run in parallel and roll back. The mechanics are the same as our other migration guides — see, for example, migrating from SendGrid for the step-by-step pattern (export suppressions, authenticate the subdomain, swap SMTP credentials, warm up, cut over).
FAQ
Do recipients see the subdomain? No — your root-domain From: address is unchanged.
Is Mailer To Go transactional-only too? It’s built for transactional email and managed deliverability, with reputation isolation via subdomains.
Explore features, the developer guide, or get started.